Check that the wiring isn't pulling it, or pushing it out of level.When installing a pickup with the trim rings, how do you guys keep the pickup level? Using the springs and just the two points of mounting, mine always want to tilt in the ring.
Is it as simple as foam underneath, or is there some magical way I'm missing?

They sit slanted to the pickup ring even out of the guitar.Check that the wiring isn't pulling it, or pushing it out of level.
Unless something is bent somewhere, the springs should keep it level with the ring if nothing is in the way.
Come to think of it, I had a Godin once that had 2 screws on one side. I remember it was a trick to swap pickups in....
I don't see why they don't make pickups with 2 mounting screws on one side so you can adjust the tilt that way. Some direct mount pickups I've seen are that way.
I always thought it makes no sense that they wouldn't have at least two tabs on one side so you could adjust the angle compared to the strings. Weird to me.This might be hard to understand with out a visual, but I always bend the feet on the pickup until it sits level. The only problem with that is it can make the pickup off center in the ring if you have to twist them more than just a little bit. It's always worked for me.
A possible problem I see with foam on one side to tilt it is it can tilt it more than you want it to so it might be tricky to get it just right.
I don't see why they don't make pickups with 2 mounting screws on one side so you can adjust the tilt that way. Some direct mount pickups I've seen are that way.
I don't see why they don't make pickups with 2 mounting screws on one side so you can adjust the tilt that way. Some direct mount pickups I've seen are that way.



Then I plugged into my tuner to finish the string install and realized, "hey bonehead. You didn't connect them up yet." oof
What strat is that smithy? Looks nice.Well, you're in luck! That is the way Fender does some of their pickups!
See the pic below of my Strat.
The pickup is the original Fender DH-1 pickup.
There are two screws on the left side of the pickup. These allow you to adjust the pickup angle.
View attachment 97712
Here are a couple shots of what this pickup looks like. These pics are not of my pickup; though, I have had the pick guard off my guitar and mine looks like this.
View attachment 97713
View attachment 97714
What strat is that smithy? Looks nice.